* {
	margin: 0;
	padding: 0;
}
ul {
	list-style: none;
}

#banner {
	border: 1px solid #F00;
	width: 900px;
	height: 500px;
	/* 超出的内容隐藏 */
	overflow: hidden;
	margin: auto;
	position: relative;
}
ul#imgList {
	margin-left: 0px;
	/* 让这个宽度能够装5张图片 */
	width: 4500px;
}

ul>li {
	float: left;
}

img {
	width: 900px;
	height: 500px;
}

#icoList {
	position: absolute;
	right: 10px;
	bottom: 10px;
}

#icoList>li>p {
	width: 30px;
	height: 30px;
	background-color: rgba(0, 0, 0, .5);
	border-radius: 50%;
	color: #FFF;
	text-align: center;
	/* 单行文本垂直居中处理 */
	line-height: 30px;
	margin: 0 5px;
	cursor: pointer;
}

#icoList>li>p:hover {
	background-color: #FFF;
	color: #000;
}

#banner>p {
	width: 50px;
	height: 50px;
	text-align: center;
	line-height: 50px;
	background-color: rgba(0, 0, 0, .5);
	color: #FFF;
	position: absolute;
	/* (500px - 50px) / 2 */
	top: 225px;
	cursor: pointer;
}

#banner>p:hover {
	background-color: #FFF;
	color: #000;
}

.left {
	left: 10px;
}

.right {
	right: 10px;
}